The infrared spectra of polytetrafluoroethylene and polychlorotrifluoroethylene have been obtained between 4000 cm—1 and 70 cm—1. Polarization measurements on oriented samples were obtained in the region of 4000 cm—1 to 300 cm—1. It is known from x-ray diffraction studies that both polymers have helical chain configur…

Material Properties and Applications

Experimental and theoretical studies of the mica polymorphs

J. V. Smith、H. S. Yoder1956-09-01OpenAlex

Summary An experimental and theoretical study has been made in order to determine the number and the structure of the possible polymorphs and to determine the structural relations between them. The simplest structures are 1M, 2M 1 , 2M 2 , 3T, 20, and 6H polymorphs, and more complicated types can be developed. Some of…

Surface and Thin Film PhenomenaX-ray Diffraction in CrystallographyHigh-pressure geophysics and materials

Kinetic Theory of Liquids.

Joseph O. Hirschfelder1956-09-01OpenAlex

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic Theory of Liquids.Joseph O. HirschfelderCite this: J. Am. Chem. Soc. 1956, 78, 18, 4820Publication Date (Print):September 1, 1956Publication History Published online1 May 2002Published inissue 1 September 1956https://pubs.acs.org/doi/10.1021/ja01599a084https://doi.or…

Inorganic and Organometallic ChemistryVarious Chemistry Research TopicsThermal and Kinetic Analysis

X-Ray Diffraction Powder Patterns of Calcium Phosphates

A. O. McIntosh、W. Jabłoński1956-08-21Analytical Chemistry

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-Ray Diffraction Powder Patterns of Calcium PhosphatesA. O. McIntosh and W. L. JablonskiCite this: Anal. Chem. 1956, 28, 9, 1424–1427Publication Date (Print):August 21, 1956Publication History Published online1 May 2002Published inissue 21 August 1956https://pubs.acs.org/do…

Glass properties and applicationsX-ray Diffraction in CrystallographyPigment Synthesis and Properties

Cation Distributions in Ferrospinels. Theoretical

Herbert B. Callen、S. E. Harrison、C. J. Kriessman1956-08-15Physical Review

The statistical thermodynamics underlying the distribution of cations over the tetrahedral and octahedral sites in ferrospinels is developed. The temperature dependence of the distribution law is analyzed by invoking the Debye approximation for the vibrational spectrum. The resultant equations permit the internal ener…

Magnetic Properties and Synthesis of FerritesTheoretical and Computational PhysicsIron oxide chemistry and applications

A Calculation of Physical Constants of Ceramic Barium Titanate

Masakazu Marutake1956-08-15Journal of the Physical Society of Japan

The dielectric, piezoelectric and elastic constants of polycrystalline ceramics at room temperature are calculated by averaging those values of single crystals on the assumption that the ceramic is composed of spherical crystallites. The calculated values are in good agreement with observed ones, showing that the piez…

Acoustic Wave Resonator TechnologiesMaterial Selection and PropertiesUltrasonics and Acoustic Wave Propagation

Cation Distributions in Ferrospinels. Magnesium-Manganese Ferrites

C. J. Kriessman、S. E. Harrison1956-08-15Physical Review

The saturation magnetization as a function of quench temperature is measured for the ferrite system ${\mathrm{Mg}}_{y}{\mathrm{Mn}}_{1\ensuremath{-}y}{\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$. From these data the ionic distribution of Mg ions is evaluated and compared to the theoretical thermodynamic analysis developed in th…

Magnetic Properties of AlloysMagnetic Properties and Synthesis of FerritesMagnetic Properties and Applications

PROCESSING AND PROPERTIES OF KNITTED STRETCH FABRICS

C. S. Whewell、D. L. Munden、M. W. A. Fletcher1956-08-01Journal of the Textile Institute. Proceedings

A general review is made of the methods of manufacture and physical properties of the following types of stretch yarn:—crimped nylon, crinkle, stretch and Ban-Lon. A general description and definitions of the physical properties of fabrics knitted from these yarns are also given. The effect of knitting stiffness (expr…

Textile materials and evaluations

Some Optical Properties of Zinc Sulfide Phosphors Doubly Activated with Copper and Manganese

Shigeo Shionoya1956-08-01Bulletin of the Chemical Society of Japan

Abstract Optical properties of ZnS: (Cu+Mn) phosphors have been extensively studies with the purpose to investigate the phenomena of sensitized luminescence in photoconductive phosphors. Spectra of emission, absorption and axcitation, thermoluminescence and photo-conductivity were measured. It was confirmed from the m…

Optical properties and cooling technologies in crystalline materialsQuantum Dots Synthesis And PropertiesLuminescence Properties of Advanced Materials

Studies on carbon black. III. Theory of bound rubber

D. S. Villars1956-08-01Journal of Polymer Science

Abstract On the hypothesis that “bound rubber” is a gel of carbon black particles, the bonding agent of which consists of the longer polymer molecules, a statistical theory is developed. The probability is first computed that a rubber molecule of i segments will be attached to j carbon black particles. By means of thi…

Polymer Nanocomposites and PropertiesChemistry and Stereochemistry StudiesAdsorption, diffusion, and thermodynamic properties of materials

Thermal Conductivity of Germanium and Silicon at Low Temperatures

G. K. White、S. B. Woods1956-08-01Physical Review

Measurements are reported of the thermal conductivity, $K$, of high-purity $n$- and $p$-type germanium, and of a single crystal of $n$-type silicon at temperatures between 2 and 150\ifmmode^\circ\else\textdegree\fi{}K. These confirm that in silicon and in annealed germanium the thermal conductivity is limited only by…

Surface and Thin Film PhenomenaSemiconductor materials and interfacesThermal properties of materials

Definition and Measurement of Crimp of Textile Fibers

E. Alexander、Menachem Lewin、H. V. Muhsam 等 4 位作者1956-08-01Textile Research Journal

Two fundamental concepts are defined, the effective crimp diameter and the effective wave number. The corresponding figures for these concepts are calculated from the measurements of the width values of the plane projection of a rotating fiber and from the measurements of the crimp ratio. These figures are obtained fo…

Vibration and Dynamic AnalysisTextile materials and evaluationsStructural Analysis and Optimization

C-Axis Electrical Conductivity of Graphite

William Primak1956-08-01Physical Review

Small crystals of natural graphite showing no evidence of twinning were found in a sample of marble from the Lead Hill mine (Ticonderoga, New York). They were isolated, handled very carefully to avoid deformation, and their $c$-axis conductivity determined. It was found to be about 2\ifmmode\times\else\texttimes\fi{}$…

Graphite, nuclear technology, radiation studiesGraphene research and applicationsGeophysical and Geoelectrical Methods